Calcium-carbid cartridge.



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UNITED STATES PATENTY OFFICE.

GEORGE GREGORY SMITH, OF FLORENCE, ITALY.

CALCIUM-CARBID CARTRIDGE.

SPECIFICATION :forming part of Letters Patent No. (560,170,` dated'october 23, 190.

Original application fled December 8, 1899, SerialNo. 739,628. Divided and this application filed May 1'7. 1900. Serial No. 17,054. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE GREGORY SMITH, lawyer, a citizen of the United States, residing at Villa Bel Riposo, San Domenico, Florence, Italy, have invented certain new and useful Improvements in Tins or Cans for Calcium Oarbid, of which the following is a full, clear, and exact description.

The present invention relates to tins or cans for containing calcium carbid for generating l acetylene gas; and the object of the invention is to provide a tin or can which will not burst when Water is fed to the carbid therein for the purpose of generating the gas. It is well known that the ordinary cans burst under these circumstances, owing to the rapid development of the gas and the consequent expansion of the carbid. When these cans burst, the residual products formed are free to pass into the generating apparatus and stop up the pipes and valves and create many other disadvantages. It is therefore essential that thesel products remain shut up in the can, so that they may be removed entirely out of the apparatus with the exhausted can.

The object of the invention is attained by placing within the can and approximately in the center of the carbid therein a tube having perforated walls and extending approximately from the top to the bottom of the can.

The longitudinal edges of the piece of metal forming the tube are not fastened together, but simply laid one over the other, and the interior of the tube is left empty, the carbid in the can occupying the annular space between the interior of the walls of the can and the exterior of the tube. The tube is perforated along its whole length and may or may not be fastened within the can, since if not fastened at the top or bottom it will be supported in position by the carbid around it.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar let-V ters of reference denote similar parts throughout both views. V

Figure lis a vertical section through a can constructed according to the present invention, and Fig. 2 is a sectional plan of the same.

Within the can a and approximately down the longitudinal center of the same the perforated tube b is arranged, having its longitudinal edges simply laid one over the other, as will be clearly seen from Fig. 2.

The can is punctured at the top and bottom at a point within the cross-sectional area of the tube and the water entering will thus have free access to every part of the carbid at once. The carbid expanding will not burst the tin or can, as has hitherto generally been the case, but will compress the tube and leave the exterior walls of the can intact.

For the purpose of holding the tube b in a central position radial arms c, having downwardly-flanged ends c' c2, are secured to the inner wall of the can adjacent to the top thereof, and similar radially-disposed arms d,

lhaving vertical ilanges d' cl2, are secured to the inner wall of the can adjacent to the bottom thereof. The flanges c 0l of these arms are secured to the can by solder or otherwise, and the flanges c2 d2 act to guide the tube b as it is inserted in the can and to retain it centrally thereof. I

One of the most important advantages of the present construction is that the perforated tube enables the water to circulate freely to all parts of the carbid at once, whereas in punctured cans having no tube the water-only meets the carbid just at the puncture, gas is rapidly developed at this point, and the residual products will partially stop the progress of the water to the other parts of the carbid, rendering the development of gas very slow and in some cases almost entirely stopping the generation of gas.

I claim as my inventionl. In combination with a receptacle for containing calcium carbid, a perforated tube located in said receptacle and having free longitudinal overlapping edges.

2. In combination with a receptacle for containing calcium carbid, guides secured to the having free longitudinal overlapping edges 1o innerwall of said receptacle; andaperforated inserted between said guiding-flanges.

tube having free longitudinal overlapping In witness whereof I have hereunto set my edges inserted between said guides. hand in presence of two witnesses.

3. In combination with a receptacle for conl f taining calcium carbid, radial arms secured GEORGE GREGORY SMI HI' to the inner wall of said receptacle adjacent Witnesses: to the top and bottom thereof, said arms havv JULIA VALLIE, ing guiding-Hanges; and a perforated tube GUSTAVUS W. ST. GIM. 

